A former Portland police officer has entered a guilty plea to one count of receipt of child pornography in federal court and will be sentenced in February.

The officer who once worked registering others as sex offenders will have to register as a sex offender himself, under a plea agreement he signed.

Scott E. ElliottMCSO

Scott Edward Elliott, 50, a 22-year veteran of the Portland Police Bureau, admitted that he used the screen name "malewantsu2004'' when he engaged in an Internet-based online discussion with another person who used the screen name "doraexplora111.'' Elliott received at least nine images of child pornography on Sept. 11, 2009 from "doraexplora111,'' according to court records.

A forensic examiner found images on Elliott's computer that depicted actual minors under the age of 18 engaged in sexually explicit conduct. Some of the files depicted prepubescent children engaged in sexually-explicit conduct, and some of the images portrayed masochistic acts, according to a plea agreement filed in U.S. District Court in Portland.

Under the plea arrangement, Elliott is expected to face a 5-year mandatory minimum prison sentence.

"The parties agree that such a sentence is both appropriate and reasonable in light or...the facts and circumstances of this case,'' Assistant U.S. Attorney Kelly A. Zusman wrote in the plea agreement. Elliott and his federal public defender, Amy Baggio, signed it on Oct. 30.

A second charge of using the Internet to entice a minor would be dismissed, under the plea agreement.

When signing the agreement, Elliott noted that he's not under the influence of alcohol or drugs, and not suffering from an illness or disability that affects this thinking except "depression and suspected PTSD,'' for post traumatic stress disorder.

Elliott resigned his position with police in May. He had been most recently assigned to East Precinct's afternoon relief patrol. He also was one of a number of officers assigned at East Precinct to help register sex offenders, part of he bureau's Sex Offender Registration Detail.

He was arrested in late March on state charges, while on police duty.

The federal indictment was based on evidence discovered after authorities executed a search warrant on Elliott's home as part of the state criminal investigation. Elliott's plea agreement in the federal case does not apply to any charges pending in state court, the plea agreement states.